package com.etc.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet Filter implementation class LoginFilter
 */
public class AdminLoginFilter implements Filter {

  
    public AdminLoginFilter() {
    }

	public void destroy() {
	}


	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest)request;
		HttpServletResponse res = (HttpServletResponse)response;
		res.setContentType("text/html;charset=utf-8");
		String url = req.getServletPath();
		HttpSession session = req.getSession();
		if(session.getAttribute("admin")!=null) {
			//放行
			chain.doFilter(request, response);
		}else {
			//如果没有登录,就跳转到登录页面
			if("/adminLogin.jsp".equals(url) || "/adminLogin.jsp".equals(url)) {
				chain.doFilter(request, response);
			}else {
				res.getWriter().print("<script>location.href='/fras/adminLogin.jsp'</script>");
			}
		}
	}
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
